{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{5}{c}}
\hline\hline
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}\\
            &\multicolumn{1}{c}{dpopdens50}&\multicolumn{1}{c}{dpopdens50}&\multicolumn{1}{c}{dpopdens50}&\multicolumn{1}{c}{dpopdens50}&\multicolumn{1}{c}{dpopdens50}\\
\hline
dpopdens45  &     -0.9444\sym{a}&     -0.9185\sym{a}&     -0.8747\sym{a}&     -0.8814\sym{a}&     -0.8884\sym{a}\\
            &    (0.0531)       &    (0.0635)       &    (0.0753)       &    (0.0670)       &    (0.0615)       \\
\hline
\(N\)       &         174       &         174       &         174       &         174       &         174       \\
\(R^{2}\)   &       0.863       &       0.899       &       0.859       &       0.859       &       0.902       \\
\hline\hline
\multicolumn{6}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{6}{l}{\footnotesize \sym{c} \(p<0.1\), \sym{b} \(p<0.05\), \sym{a} \(p<0.01\)}\\
\end{tabular}
}
